Electric-cable attaching device



Aug. 24, 1937. P." M. PETRIE 2,091,054

ELECTRIC CABLE ATTACHING DEVICE Filed Sept. 28, 1936 Patented Aug. 24, 1937 UNITED STATES PATENT OFFICE f The Rattan Haven, Conn.,

Manufacturing Company, New

a Vcorporation of Connecticut Application september y2s, 1936, serial No. 102,859

7 Claims.

This invention relates to an improvement in attaching devices and particularly to devices for attaching electric cable to junction-boxes, outletboxes, etc.

One of the objects of the present invention is to provide a simple, reliablev and effective electriccable attaching device having a wide range of use, and economical to manufacture.

A further object is to provide a superior electric-cable attaching device characterized by its capacity for securely attachingr electric cables of varying sizes to an outlet-box, junction-box, or other electrical device.

With the above and other objects in View, as will appear to those skilled in the art from the present disclosure, this invention includes all features in the said disclosure which are novel over the prior art.

In the accompanying drawing:

Fig. 1 is an outer-end view of one form which an attaching device embodying the present invention may assume;

Fig. 2 is a View thereof Fig. 3 toward device;

Fig. 4 is a transverse the line 4 4 of Fig. 1;

Fig. 5 is a transverse sectional View taken on the line 5-5 of Fig. l;

in side elevation; is a view similar to Fig. 2 but looking the diametrically opposite side of the sectional view taken on Fig. 6 is an end View corresponding to Fig. 1v but showing the clamping-member reversed forV clamping a cable of relatively-small size;

Fig. '7 is a view of the outer end of the clamping-member detached;

Fig. 8 is a view of one face of the clampingmember; and i Fig. 9 is a view of the clamping-member.

The electric-cable attaching device herein chosen for illustration comprises in the main a body-member, generally designated by the numerel I 0, and a clamping-member, generally designated by the numeral I I. The body-member I includes an externally-threaded tubular stem I2, a polygonal wrench-receiving portion I3, and an upstanding clamping-portion I4 having its central portion substantially conforming to the curvature of the fitting and provided with two outwardly-extending ears I-I5, each of which is provided with a threaded perforation I6 for the reception of one of two clamping-screws I'I-I'I.

The reversible clamping-member II is placed in opposition to the clamping-portion I4 of the body-member I0 and is provided with two oppoopposite face of the sitely-oifsetting ears I 8 I 8, vided with a cylindrical perforation I9, and the other of which is provided with a notch 2! (Figs. 3 and 8). The clamping-screws Il I'I, before referred to, respectively extend through the perforation I9 and the notch 20 in the reversible clamping-member II and intothe threaded perforations IG-IB in the clamping-portion I4 of the body-member, and serve to draw the said reversible clamping-member and the said clamping-portion toward each other to clamp an electric cable therebetween.

The reversible clamping-member I I is formed in one face with a notch-like cable-receiving recess or socket 2| of relatively-large size and radius, and is formed in its opposite face at the terminus of an offsetting-lug 22, with a notch-like cable-receiving recess or socket 23 of relativelysmall size and radius ascompared to the said recess 2l. Extending across the recess 2| of the clamping-member II is a is preferably inclined with respect to the general plane of the clamping-member II, as shown in Fig. 8, to substantially conform to the helix angle of the covering of metal-covered electric cables. The recess 23 of the reversible clampingmember I I is also provided with a gripping-rib 25 for the purpose of enabling the said clampingmember II to more firmly grip a relatively-small size electric cable, as shown in Fig. 6.

The threaded stemV I2 of the body-member IB is adapted to be passed througlft a perforation 26 in the wall 27 of an outlet-box or other electrical device, represented by broken lines in Fig. 2. The device may be attached to the wall of the outlet-box by means of a clamping-nut 28 applied to the stem I2, also as indicated by broken lines in Fig. 2. When the attaching device is required to receive an electric cable of relatively-large diameter, such as the cable 29 represented by broken lines in Fig. 1, the reversible clamping- .member II will be mounted upon the body-member I0 with its relatively-large recess 2l facing toward the clamping-portion I4 of the bodymember I0. screws I'I, the electric cable 29 tached to the clamping-device and hence to the outlet-box 27 or other electrical device.

If, however, it is desired to clamp an electric cable 30 of relatively-small diameter, the reversible clamping-member II is reversed and the relatively-small recess 23 of the lug 22 is faced toward the clamping-portion I4 of the bodymember I0, as indicated in Fig. 6.

gripping-rib 24, which Upon tightening the clamping' Will be firmly atone of which is pro- Il from the body-member I during the installation or removal of an electric cable from the device, the said clamping-member ll may be swung about the clamping-screw I1 passing through its perforation I9 into a retired position, as indicated by broken lines in Fig. 3. This swinging of the clamping-member Il into a clearance position is, as will be noted from the accompanying drawing, permitted by the notch 20.

From the foregoing, it will be seen .that the electric-cable attaching device of the present invention may be used to attach .either large or small electric cables to an outlet-box or the like without requiring a complex structure and without sacrificing the surety of action.

The invention may be carried out in other specic ways than that herein set forth Without departing from the spirit and essential characteristics of the invention, and the present embodiment is, therefore, to be considered in all respects as illustrative and ynot restrictive, and all changes coming within the lmeaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

l.. An electric-cable attaching device, comprising a body-member having a clamping-portion; an independently-formed reversible clamping-member carried by and movable with respect to the clamping-portion of the said body-member, the said clamping-member having two cable-receiving sockets, one of which sockets is larger than the other and either of which may be faced toward the clamping-portion of the said body-member; and means for forcing the selected cable-receiving socket of the said reversible clamping-member toward the clampingpcrtion of the said body-member.

2. An electric-cable attaching device, comprising a body-member having a clamping-portion; an independently-formed reversible clamping-member carried by and movable with respect to the clamping-portion of the said body-member, the said clamping-member having two cablereceiving sockets, one of which sockets is larger than the other and either of which may be faced toward the clamping-portion of the said bodymember; and a pair of spaced-apart clampingscrews extending between the said body-member and the said reversible clamping-member and serving to force the selected cable-receiving socket of the latter toward the clamping-portion of the said body-member.

3. An electric-cable attaching device, comprising a body-member having a clamping-portion; an independently-formed reversible clamping-member carried by and movable with respect to the clamping-portion of the said bodymember, the said clamping-member having a cable-receiving socket in each of two of its faces, l

one of the said cable-receiving sockets being 5 larger than the other and either of which may be faced toward the clamping-portion of the said body-member; and means for forcing the selected cable-receiving socket of the said reversible clamping-member toward the clampingportion of the said body-member.

4. An electric-cable attaching device, comprising a body-member having a clamping-portion; an independently-formed reversible clampingmember carried by and movable with respect to the clamping-portion of the said body-member, the said clamping-member having a cable-receiving socket in each of two of its faces, one of the said cable-receiving sockets being larger than the other and either of which may be faced toward the clamping-portion of the said bodymember; and a pair of clamping-screws extending through the said reversible clamping-member and the clamping-portion of the said bodymember to force the selected cable-receiving socket of the said clamping-member toward the clamping-portion of the said body-member.

5. An electric-cable attaching device, comprising a body-member having a clamping-portion; an independently-formed reversible clampingmember carried by and movable with respect to the clamping-portion of the said body-member, the said clamping-member having two notch-like cable-receiving sockets, one of which said notchlike sockets is larger than the other and either of which may be faced toward the clampingportion of the said body-member; and means for forcing the selected notch-like cable-receiving socket of the said reversible clamping-member toward the clamping-portion of the said bodymember. f

6. An electric-cable attaching device comprising a body-member having al clamping-portion and an independently-formed reversible clamping-member carried by and movable with respect to the said body-member and having an offsetting-lug, the said clamping-member having two cable-receiving sockets respectively of different sizes, one being formed in the said offsetting-lug and the other being formed in the face of the clamping-,member opposite the said lug; and means for forcing the selected cable-receiving socket of the said reversible clamping-member toward the clamping-portion of the said bodymember.

'7. An electric-cable attaching device comprising a body-member having a clamping-portion and an independently-formed reversible clamping-member carried by and movable with respect to the said body-member and having an offsetting-lug, the said clamping-member having two cable-receiving sockets respectively of different sizes, one being formed in the said offsetting-lug and the other being formed in the face of the clamping-member opposite vthe said lug; and a pair of clamping-screws extending through the said reversible clamping-member and the clamping-portion of the said body-member to force the selected cable-receiving socket of the said clamping-member toward the clamping-portion of the said body-member.

PETER M. PETRIE. 

